如何獲取外網IP和IP的資訊

在公司做專案的時候用到根據手機的IP來判斷使用者所在地以及運營商來給使用者分配線路，首先要怎樣獲取外網IP，其實很簡單用第三方的網站就可以了

NSError *error;

NSURL *ipURL = [NSURL URLWithString:@"http://ifconfig.me/ip"];

NSString *ipString = [NSString stringWithContentsOfURL:ipURL encoding:NSUTF8StringEncoding error:&error];

得到了IP，我們就可以根據IP來獲取IP的所屬國家、省份、運營商等資訊。你可以用百度、淘寶、ipip等第三方來查詢IP資訊，淘寶的查詢程式碼如下：

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

NSURL *url = [NSURL URLWithString:@"http://ifconfig.me/ip"];

NSError *error = nil;

NSString *ipString = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:&error];

if (error) {

NSLog(@"fetch WAN IP Address failed:%@",error);

dispatch_async(dispatch_get_main_queue(), ^{

});

}else{

dispatch_async(dispatch_get_main_queue(), ^{

NSString *httpUrl = @"http://ip.taobao.com/service/getIpInfo.php";

NSString * httpArg = [NSString stringWithFormat:@"ip=%@",ipString];

NSString *urlStr = [[NSString alloc]initWithFormat: @"%@?%@", httpUrl, httpArg];

//                void (^holdBlock)(id response, NSError *error) = [handler copy];

NSURL *url = [NSURL URLWithString: urlStr];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL: url cachePolicy: NSURLRequestUseProtocolCachePolicy timeoutInterval: 10];

[request setHTTPMethod: @"GET"];

[request addValue: @"您自己的apikey" forHTTPHeaderField: @"apikey"];

[NSURLConnection sendAsynchronousRequest: request

queue: [NSOperationQueue mainQueue]

completionHandler: ^(NSURLResponse *response, NSData *data, NSError *error){

if (error) {

NSLog(@"Httperror: %@%ld", error.localizedDescription, (long)error.code);

//                                              holdBlock(nil, error);

} else {

NSInteger responseCode = [(NSHTTPURLResponse *)response statusCode];

NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"HttpResponseCode:%ld", (long)responseCode);

NSLog(@"HttpResponseBody %@",responseString);

//                                              holdBlock(responseString, nil);

}

}];

});

}

});

用IPIP查詢最快，但是免費的限制比較多，付費的查詢其實也不算太貴。IPIP的網址：http://www.ipip.net

免費的查詢介面：

http://freeapi.ipip.net/IP

付費的查詢介面：

http://ipapi.ipip.net/find

請求方式 HTTP GET

引數 addr 118.28.8.8

Header Token cc87f3c77747bccbaaee35006da1ebb65e0bad57

比免費的繁瑣一些，但是用afn也比較簡單，程式碼：

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

manager.responseSerializer = [AFJSONResponseSerializer serializer];

manager.requestSerializer=[AFJSONRequestSerializer serializer];

[manager.requestSerializer setValue:@"token" forHTTPHeaderField:@"Token"];

NSLog(@"%@",manager.requestSerializer.HTTPRequestHeaders);

NSDictionary * dic = @{@"addr":ipString};

[manager GET:@"http://ipapi.ipip.net/find" parameters:dic progress:^(NSProgress * _Nonnull downloadProgress) {

} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

NSLog(@"------------%@",responseObject);

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

}];